$a Regional'nye geoinformacionnye sistemy / A. V. Koškarev, V. P. Karakin. - Moskva, 1987. $b Red. ; s. tyt. (otv. red. kandidat geografičeskih nauk P. Â. Baklanov)
670
$a LCA online $b (Baklanov, Petr Iakovlevich)
670
$a RNB online $b (Baklanov, Petr Âkovlevič (1946- ))